User's Manual
Table Of Contents
- About the Modules
- What’s on the Module?
- About the Development Board
- Basic description
- Switches and buttons
- I2C and SPI header connectors
- Serial port connectors
- VGA connector / External LCD clock
- Development board SO-DIMM connector, P15
- Application-specific expansion headers - P16 and P17
- LCD application board header, P18
- USB Device application header, P32
- Digital I/O, P19
- Power over Ethernet (PoE) connectors
- Through-hole prototyping (wrap-field) area, P3 and P4
- Development board LEDs
- Current Measurement Option (CMO)
- Power jack, P12
- Test points
- Factory default interface configuration for development board
- LCD and USB Configuration
- Module Specifications
- Mechanical dimensions
- Environmental information
- Network interface
- Power requirements
- Real-time clock
- I2C signals
- USB interface
- Module reset
- Module / SO-DIMM signal characteristics
- Electrical characteristics
- DC electrical characteristics
- USB internal PHY DC electrical inputs and outputs
- Antenna information
- Antenna specifications - 2 dBi Dipole
- Antenna specifications - 5 dBi Dipole
- Antenna specifications - 2 dBi PCB mount
- FCC RF radiation exposure statement
- Safety statements
- Dimensions and PCB Layouts
- Certifications
. . . . .
ABOUT THE DEVELOPMENT BOARD
Current Measurement Option (CMO)
www.digiembedded.com 55
The LED indicators are dual-state, and are connected to the TTL side of the EIA
transceivers.
Green represents a negative voltage on the DB9 connector pin.
Red represents a positive voltage DB9 connector pin.
The intensity and color of the LED will change when the voltage is switching.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current Measurement Option (CMO)
The Current Measurement Option uses 0.025R series resistors to measure the
current on the development board’s +3.3V (R78) and +5V (R69) power supplies.
Serial port A LEDs Name Function Serial Port B LEDs Name Function
CR12 DCD# CR20 DCD#
CR13 RI# CR21 RI#
CR14 DSR# CR22 DSR#
CR15 DTR# CR23 DTR#
CR16 CTS# CR24 CTS#
CR17 RTS# CR25 RTS#
CR18 RXD CR26 RXD
CR19 TXD CR27 TXD